Power Filter for Audio Dilemma

[bchinn]

Im fairly certain I have power line noise coming through my speakers. At random, I get "pops" that seem to happen when the refrigerator turns off. I also get "static" which during one episode the only clue I could find was the dryer running downstairs. The pops and static only last about 2-3 seconds at a time and happen randomly throughout the day and night.

Im pretty sure its line noise since I had the same problems with my old passive speakers running off a separate amp, and now the same problem with my new active powered speakers. Ive tried switching outlets and get the same problem. I also get the exact same problem through my computer speakers which are across the room in a different outlet. (probably on the same circuit)

I live in a studio in which all ceiling lighting is on dimmers also. Im not sure if this is also contributing.

Ive read that Power filters will help my problem, but never tried them. Im pretty sure I dont need voltage regulation, so no need for conditioner, just filter.

My main question is whether to go with a parallel filter like the audioprism quietlines or a series filter like the APC C5. Im skeptical that running power through filters in series to the speakers wont adversely affect the sound. On the other hand, Im not sure how effective a parallel filter is and the APC C5 seems to have great specs.

Any suggestions would be greatly appreciated!

Audioprism Quietline available from elusivedisc.com

APC C5 power filter available from apc.com

 

[m_vanmeter]

I have used APC products for years and think very highly of the company. Given your two choices, I would try the APC unit first. Check the internet carefully, prices from well rated on-line dealers can go from $50 to $100+

you could also have a problem with insufficient circuits....too many devices on the same circuits.

 

[omaro.medina]

I get a Hum???

I too get the humming in the speakers. The problem seems to be happening between the cable box and receiver. I also get the lines going up the screen only with the cable box on. I recently pruchased a ground loop isolator from Radio Shack...didn't do the trick. Went to a big box store and the guys with the black ties said to get a Monster Power Surge protector?? IF I have all my HT stuff plugged into one outlet will a surge protector do the trick or should i install an additional 110v outlet for relief??

 

[TLS Guy]

I too get the humming in the speakers. The problem seems to be happening between the cable box and receiver. I also get the lines going up the screen only with the cable box on. I recently pruchased a ground loop isolator from Radio Shack...didn't do the trick. Went to a big box store and the guys with the black ties said to get a Monster Power Surge protector?? IF I have all my HT stuff plugged into one outlet will a surge protector do the trick or should i install an additional 110v outlet for relief??

You have a ground loop and a power bar will make no difference.

As I understand it you only have trouble if your cable box is connected to the cable system. If that is correct please confirm and let us know exactly where you put the ground loop isolator. The we can help you.

 

[TLS Guy]

Im fairly certain I have power line noise coming through my speakers. At random, I get "pops" that seem to happen when the refrigerator turns off. I also get "static" which during one episode the only clue I could find was the dryer running downstairs. The pops and static only last about 2-3 seconds at a time and happen randomly throughout the day and night.

Im pretty sure its line noise since I had the same problems with my old passive speakers running off a separate amp, and now the same problem with my new active powered speakers. Ive tried switching outlets and get the same problem. I also get the exact same problem through my computer speakers which are across the room in a different outlet. (probably on the same circuit)


I live in a studio in which all ceiling lighting is on dimmers also. Im not sure if this is also contributing.

Ive read that Power filters will help my problem, but never tried them. Im pretty sure I dont need voltage regulation, so no need for conditioner, just filter.

My main question is whether to go with a parallel filter like the audioprism quietlines or a series filter like the APC C5. Im skeptical that running power through filters in series to the speakers wont adversely affect the sound. On the other hand, Im not sure how effective a parallel filter is and the APC C5 seems to have great specs.

Any suggestions would be greatly appreciated!

Audioprism Quietline available from elusivedisc.com

APC C5 power filter available from apc.com

I think only an expensive regenerative UPS will solve your problem in line with your equipment. The interference should not be bleeding into all those circuits. Something is a miss at the panel most likely, probably a neutral problem, or main grounding problem. That is where to look first.